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package filtros;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
 *
 * @author rsaldana
 */
@WebFilter("/views/*")
public class SessionFilter  implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
      
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {      
       HttpSession session = ((HttpServletRequest)request).getSession(false);
       if(session.getAttribute("usuario")==null){           
    	 ((HttpServletResponse)response).sendRedirect(((HttpServletRequest)request).getContextPath());
       }else{
           chain.doFilter(request, response);
       }	
    }

    @Override
    public void destroy() {
        
    }
    
}
